GBA Romhack White Screen

[Liirian]

Pi Model or other hardware: 2
Power Supply used: 5.25V / 2A
RetroPie Version Used: 4.2
Built From: retropie-4.2-rpi2_rpi3.img
USB Devices connected: Bluetooth Adapter
Controller used: Dualshock 4
Error messages received: White screen after GBA startup screen
File: ..\retropie\roms\gba\Pokemon Light Platinum.gba
Emulator: lr-gpSP
Attachment of config files: Not Modified
How to replicate the problem: Attempting to start a Pokemon romhack I acquired called Light Platinum results in the game just going white on any emulator I run it through on the Retropie. I've already determined the way to get it to work on a PC-based emulator like Visual Boy Advanced is to change the Save Type of the emulator to Flash 128K, and confirmed that this works with Visual Boy Advanced while testing the rom on my computer, however I am unsure how to get this to properly work on my Retropie. Advice on how to do this would be appreciated, as attempting to search for how to do this hasn't gone anywhere. From what I can tell, this is usually configured by game_config.txt for traditional GBA games, but I don't know how to add an entry for a romhack into it.

[backstander]

@Liirian
Give this a try (not sure if it will work):

Make a new "text" file with the same name as the ROM with .cfg appended to it like this:

nano ~/RetroPie/roms/gba/Pokemon\ Light\ Platinum.gba.cfg

Then put this line in the .cfg file and save:

flash_rom_type = 128KB

Let me know if that works

[backstander]

@Liirian
I guess Pokemon Light Platinum is a hack of Pokemon Ruby

If the above doesn't work, maybe you could also try making a ~/RetroPie/roms/gba/game_config.txt file and putting something like this in it:

# Pokemon Ruby (U) [!]
game_name = POKEMON RUBY
game_code = AXVE
vender_code = 01
flash_rom_type = 128KB

I'm not sure how you find the "game_name" and "game_code" for a ROM. If someone else knows, please chime in ;-)

[backstander]

@Liirian
Over my lunch break I downloaded pokemon_light_platinum_final.gba.zip and gave it a go with lr-mgba and it worked without any issues. I didn't even have to set the "flash_rom_type" or anything.

[Liirian]

@backstander

Oh, thank you, finding a pokemon_light_platinum_final.gba.zip worked! I don't know what was wrong with the other ROMS, because they all worked in the PC emulator with only some minor setting tweaks. That's odd, but as long as I can get it to work that's fine with me.